# CVE-2026-3820: Supermicro BMC's SMTP service contains a command injection vulnerability

> An attacker with admin privileges can inject commands into the SMTP service configuration, leading to arbitrary code execution or system compromise.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 4 Jun 2026
- **Updated:** 5 Jun 2026
- **Also known as:** GHSA-wp43-6fh8-q2qr

## What is CVE-2026-3820?

CVE-2026-3820 is a high-severity command injection vulnerability in SMCI AS-2115HS-TNR, published on 4 Jun 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

There is a vulnerability in the Supermicro BMC  SMTP service at Supermicro AS-2115HS-TNR. 
An attacker may obtain administrator privileges and inject specially crafted characters into the SMTP service configuration. This may cause the underlying system to execute unintended commands during process invocation.

Potential impact includes denial-of-service attacks, arbitrary code execution, or permanent compromise of the controller.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2026-3820?


## How do I fix CVE-2026-3820?

No fix has been published for CVE-2026-3820 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-3820 being exploited?

There is no known exploitation of CVE-2026-3820 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-3820 and fix it if it is affected.

What it is: CVE-2026-3820 is a high-severity command injection vulnerability in SMCI AS-2115HS-TNR, published on 4 Jun 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-3820 in the wild and no public exploit code.

Affected product: SMCI AS-2115HS-TNR. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-3820/ (Markdown: https://insights.sbomify.com/CVE-2026-3820/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-3820
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-3820
- OSV: https://osv.dev/vulnerability/CVE-2026-3820

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-3820/
Summaries are generated and may contain mistakes; the official description above is the record.